Precracked Reinforced Concrete T-Beams Repaired in Shear with Prestressed Carbon Fiber-Reinforced Polymer Straps

Samir Dirar; Janet M. Lees; Chris Morley

doi:10.14359/51685838

Precracked Reinforced Concrete T-Beams Repaired in Shear with Prestressed Carbon Fiber-Reinforced Polymer Straps

Samir Dirar
, Janet M. Lees
, Chris Morley

Civil Engineering

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

556 Downloads (Pure)

Abstract

The results of an experimental and numerical investigation involving unstrengthened reinforced concrete (RC) T-beams and precracked RC T-beams strengthened in shear with prestressed carbon fiber-reinforced polymer (CFRP) straps are presented and discussed. The results provide insights into the influence of load history and beam depth on the structural behavior of both unstrengthened and strengthened beams. The strengthened beams exhibited capacity enhancements of 21.6 to 46% compared to the equivalent unstrengthened beams, demonstrating the potential effectiveness of the prestressed CFRP strap system. Nonlinear finite element (FE) predictions, which incorporated the load history, reproduced the observed experimental behavior but either underestimated or overestimated the post-cracking stiffness of the beams and strap strain at higher load levels. These limitations were attributed to the concrete shear models used in the FE analyses.

Original language	English
Article number	110-S71
Pages (from-to)	855-866
Number of pages	12
Journal	ACI Structural Journal
Volume	110
Issue number	5
DOIs	https://doi.org/10.14359/51685838
Publication status	Published - 1 Sept 2013

Keywords

beam
fiber-reinforced polymer
finite element
precracking
shear
straps
strengthening

ASJC Scopus subject areas

Civil and Structural Engineering

Access to Document

10.14359/51685838

Dirar_2013_ACI
Eligibility checked for repository: 16/07/2014
Accepted author manuscript, 734 KBLicence: None: All rights reserved

http://www.concrete.org/Publications/ACIMaterialsJournal/ACIJournalSearch.aspx?m=details&ID=51685838

25 Citations
6 Article
1 Conference contribution

Finite element parametric study of reinforced concrete beams shear-strengthened with embedded FRP bars
Qapo, M., Dirar, S. & Jemaa, Y., 1 Aug 2016, In: Composite Structures. 149, p. 93-105
Research output: Contribution to journal › Article › peer-review

Open Access
File
17 Citations (Scopus)

775 Downloads (Pure)
CFRP shear strengthening of reinforced-concrete T-beams with corroded shear links
Qin, S., Dirar, S., Yang, J., Chan, A. & Elshafie, M., Oct 2015, In: Journal of Composites for Construction. 19, 5, 10 p., 04014081.
Research output: Contribution to journal › Article › peer-review

Open Access
File
23 Citations (Scopus)

397 Downloads (Pure)
Deep embedment strengthening of full-scale shear-deficient reinforced concrete beams
Jemaa, Y., Jones, C. & Dirar, S., Dec 2015, Proceedings of the 12th International Symposium on Fiber Reinforced Polymers for Reinforced Concrete Structures (FRPRCS-12) and The 5th Asia-Pacific Conference on Fiber Reinforced Polymers in Structures (APFIS-2015) Joint Conference. Wu, Z., Wu, G. & Wang, X. (eds.). Southeast University, 6 p. P-091
Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Open Access
File
Nonlinear finite element modelling and parametric study of CFRP shear-strengthened prestressed concrete girders
Qapo, M., Dirar, S., Yang, J. & Elshafie, M., 1 Feb 2015, In: Construction and Building Materials. 76, p. 245-255 11 p.
Research output: Contribution to journal › Article › peer-review

File
10 Citations (Scopus)

536 Downloads (Pure)
Phased Nonlinear Finite-Element Analysis of Precracked RC T-Beams Repaired in Shear with CFRP Sheets
Dirar, S., Lees, J. M. & Morley, C., 1 Jul 2013, In: Journal of Composites for Construction. 17, 4, p. 476-487 12 p.
Research output: Contribution to journal › Article › peer-review

Open Access
File
14 Citations (Scopus)

475 Downloads (Pure)
Precracked Reinforced Concrete T-Beams Repaired in Shear with Bonded Carbon Fiber-Reinforced Polymer Sheets
Dirar, S., Lees, J. & Morley, C., 1 Mar 2012, In: ACI Structural Journal. 109, 2, p. 215-224 10 p., 109-S20.
Research output: Contribution to journal › Article › peer-review

Open Access
File
Fibre-reinforced polymer strengthening of pre-cracked concrete structures
Lees, J., Morley, C., Yang, X.-S. & Dirar, S., 2005, Concrete, 39, 9, p. 36-37.
Research output: Contribution to specialist publication › Article

Cite this

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title = "Precracked Reinforced Concrete T-Beams Repaired in Shear with Prestressed Carbon Fiber-Reinforced Polymer Straps",

abstract = "The results of an experimental and numerical investigation involving unstrengthened reinforced concrete (RC) T-beams and precracked RC T-beams strengthened in shear with prestressed carbon fiber-reinforced polymer (CFRP) straps are presented and discussed. The results provide insights into the influence of load history and beam depth on the structural behavior of both unstrengthened and strengthened beams. The strengthened beams exhibited capacity enhancements of 21.6 to 46\% compared to the equivalent unstrengthened beams, demonstrating the potential effectiveness of the prestressed CFRP strap system. Nonlinear finite element (FE) predictions, which incorporated the load history, reproduced the observed experimental behavior but either underestimated or overestimated the post-cracking stiffness of the beams and strap strain at higher load levels. These limitations were attributed to the concrete shear models used in the FE analyses.",

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N2 - The results of an experimental and numerical investigation involving unstrengthened reinforced concrete (RC) T-beams and precracked RC T-beams strengthened in shear with prestressed carbon fiber-reinforced polymer (CFRP) straps are presented and discussed. The results provide insights into the influence of load history and beam depth on the structural behavior of both unstrengthened and strengthened beams. The strengthened beams exhibited capacity enhancements of 21.6 to 46% compared to the equivalent unstrengthened beams, demonstrating the potential effectiveness of the prestressed CFRP strap system. Nonlinear finite element (FE) predictions, which incorporated the load history, reproduced the observed experimental behavior but either underestimated or overestimated the post-cracking stiffness of the beams and strap strain at higher load levels. These limitations were attributed to the concrete shear models used in the FE analyses.

AB - The results of an experimental and numerical investigation involving unstrengthened reinforced concrete (RC) T-beams and precracked RC T-beams strengthened in shear with prestressed carbon fiber-reinforced polymer (CFRP) straps are presented and discussed. The results provide insights into the influence of load history and beam depth on the structural behavior of both unstrengthened and strengthened beams. The strengthened beams exhibited capacity enhancements of 21.6 to 46% compared to the equivalent unstrengthened beams, demonstrating the potential effectiveness of the prestressed CFRP strap system. Nonlinear finite element (FE) predictions, which incorporated the load history, reproduced the observed experimental behavior but either underestimated or overestimated the post-cracking stiffness of the beams and strap strain at higher load levels. These limitations were attributed to the concrete shear models used in the FE analyses.

KW - beam

KW - fiber-reinforced polymer

KW - finite element

KW - precracking

KW - shear

KW - straps

KW - strengthening

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DO - 10.14359/51685838

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ER -

Precracked Reinforced Concrete T-Beams Repaired in Shear with Prestressed Carbon Fiber-Reinforced Polymer Straps

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Fingerprint

Research output

Finite element parametric study of reinforced concrete beams shear-strengthened with embedded FRP bars

CFRP shear strengthening of reinforced-concrete T-beams with corroded shear links

Deep embedment strengthening of full-scale shear-deficient reinforced concrete beams

Nonlinear finite element modelling and parametric study of CFRP shear-strengthened prestressed concrete girders

Phased Nonlinear Finite-Element Analysis of Precracked RC T-Beams Repaired in Shear with CFRP Sheets

Precracked Reinforced Concrete T-Beams Repaired in Shear with Bonded Carbon Fiber-Reinforced Polymer Sheets

Fibre-reinforced polymer strengthening of pre-cracked concrete structures

Cite this